/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.forms.common.rendering.client.widgets.util;

import java.io.IOException;
import java.util.Map;

import com.google.gwt.text.shared.Renderer;

public class DefaultValueListBoxRenderer<T> implements Renderer<T> {

    public static final String NULL_STR = "null";

    private Map<T, String> values;

    public void setValues(Map<T, String> values) {
        this.values = values;
    }

    @Override
    public String render(T value) {

        if(values == null || !values.containsKey(value)) {
            return NULL_STR;
        }

        return values.get(value);
    }

    @Override
    public void render(T value,
                       Appendable appendable) throws IOException {
        appendable.append(render(value));
    }
}
